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If a neurons inter-celluar potassium level (K+) is 410mM and it takes -70mV to maintain resting cell potential, what is the concentration of potassium outside of the neuron? (assume that only the difference in potassium concentration is responsible for the current necessary to maintain resting cell potential)
Combustion reactions involve reacting a substance with oxygen. When compounds containing carbon and hydrogen are combusted, carbon dioxide and water are the products. Using the enthalpies of combustion for C4H4 (-2341 kJ/mole)
The delta H for the neutralization of NaOH with H2SO4 is -144kj/mol H2SO4. What is the maximum measured temperature in the styrofoam cup
These two solutions will be added together into a beaker to create one solution. Adding them together cause them to dilute each other. Calculated the new molarity of HX. Give your answer to four decimal places.
a couple drops of phenophalein indicator and then was titrated with 8.1mL of NaOH until it turned pink. what is the concentration of NaOH?
a) What must be the velocity of electrons if their associated wavelength is to equal the longest wavelength line in the Lyman series
Indicate whether each of the following describes the oxidizing agent or the reducing agent in an oxidation-reduction reaction: a)the substance that is reduced. b)the substance that loses electrons.
A solution of ethylene glycol and water has a boiling point of 109.8 degrees celcius. What is the freezing point. (Kf H2o=1.86 degrees celcius/m; Kb H20=0.52 degrees celcius/m)
The radioactive decay of Tl-206 to Pb-206 has a half-life of 4.20 min. Starting with 3.70 1022 atoms of Tl-206, calculate the number of such atoms left after 38.0 min.
A 1.50L sample of neon gas at 1.10 atm and 25 degrees celsius is heated to 45 degrees celsius. The neon gas is then subjected to a pressure of 1.50 atm. Determine the new volume of the neon gas.
Suppose you have a sample which should melt at 100-101 degree C. You place 0.015 grams in a capillary tube in an oil bath at 101 degree C. If the heat of fussion for the sample is 50 cal/gram
Propose a mechanism for the following reaction, using arrows to show the flow of electrons. Be sure to show every step.
A person inhales air richer in O2 and exhales air richer in CO2 and water vapor. During each hour of sleep, a person exhales a total of 300. L of this CO2-enriched and H2O-enriched air.
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